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圆展开---探究圆周率
Author:
陈宜红
GeoGebra
New Resources
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
錐體建築師
兩組對邊相等的四邊形
球体的体积推导（优化版）
Discover Resources
deductive geometry
Sequence指令練習(正n邊形面積的展開)
circle
圓面積示範
單點透視法
Discover Topics
Cone
Prism
Definite Integral
Standard Deviation
Perimeter